asyncrat | 661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76

General

Target
661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
Size 45KB
Sample260601-t7bddsaw2z
SHA256 661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76
MD5 2281b848d2d98744e7a273a52116d9a3
SHA1 6da2511fc10f7baf3b718c6cb437587a94efff77
SHA512 99b9f1c10145b3e3dc41581b4f1b50e47e81a30ddd8db5003dfc05861443add71ee7335128845242d5bab98022b5bb1ff065815eb515036eb5d0d5d6e2bfc188
SSDEEP 768:cu7//5THrq+CWUoDuMmo2qFTls5ohEaMPIS3jbQgX3imzPs4JPw7LKkBDZUx:cu7n5TH2A2m44EaxSTbXXSmzk4J47LKd
TLSH
T1F9232B003BE9822BF2BE4F7899F261454A7AF2637603D54D1CC442DB5613FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

phimsexviet1.blog:443
phimsexviet1.blog:80
phimsexviet1.blog:7797
phimsexviet1.blog:8707
phimsexviet1.blog:6620
www.phimsexviet1.blog:443
www.phimsexviet1.blog:80
www.phimsexviet1.blog:7797
www.phimsexviet1.blog:8707
www.phimsexviet1.blog:6620
mirai.phimsexviet1.blog:443
mirai.phimsexviet1.blog:80
mirai.phimsexviet1.blog:7797
mirai.phimsexviet1.blog:8707
mirai.phimsexviet1.blog:6620
dridex.phimsexviet1.blog:443
dridex.phimsexviet1.blog:80
dridex.phimsexviet1.blog:7797
dridex.phimsexviet1.blog:8707
dridex.phimsexviet1.blog:6620
codered.phimsexviet1.blog:443
codered.phimsexviet1.blog:80
codered.phimsexviet1.blog:7797
codered.phimsexviet1.blog:8707
codered.phimsexviet1.blog:6620
malware.phimsexviet1.blog:443
malware.phimsexviet1.blog:80
malware.phimsexviet1.blog:7797
malware.phimsexviet1.blog:8707
malware.phimsexviet1.blog:6620

Mutex

davBRzFiBnnW

Attributes

delay
0
install
true
install_file
wvcia.exe
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x001a00000002b68f-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1572	wvcia.exe
1220	wvcia.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wvcia.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wvcia.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3768	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
5724	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
Token: SeDebugPrivilege	1572	wvcia.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 3224	4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe	80
PID 4768 wrote to memory of 5976	4768	661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe	81
PID 3224 wrote to memory of 5724	3224	cmd.exe	84
PID 5976 wrote to memory of 3768	5976	cmd.exe	85
PID 5976 wrote to memory of 1220	5976	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe
"C:\Users\Admin\AppData\Local\Temp\661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "wvcia" /tr '"C:\Users\Admin\AppData\Roaming\wvcia.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3224
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "wvcia" /tr '"C:\Users\Admin\AppData\Roaming\wvcia.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5724
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF637.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5976
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3768
- - C:\Users\Admin\AppData\Roaming\wvcia.exe
    "C:\Users\Admin\AppData\Roaming\wvcia.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1220

C:\Users\Admin\AppData\Roaming\wvcia.exe
"C:\Users\Admin\AppData\Roaming\wvcia.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1572

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpF637.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpF637.tmp.bat
Size 149B
SHA256 aec28f3c206bca460b103d7f2bdb918af36566d6036fbf5b7c06dfe97d48c77a
MD5 bf3c62b8c52477c980c994e50f903ad5
SHA1 3fb5a8915e45ecb3a7714ace322cdb68f25dfff5
SHA512 7b9667952b82db94f7fca097b6b892cf2d5b7dae2232d46fb7bb46688902626ffc973d3f2f9aced1cfed0be1bddf4f5f31a54f7b6aad8a89a058b5f8786f3cde
TLSH
T17BC02B4295C5FA0E2C06142307FAD58C91FB7C693F40BB40C344840D138048CF0DE341
MD5 SHA1 SHA512 TLSH

Submit Download

wvcia.exe

Path C:\Users\Admin\AppData\Roaming\wvcia.exe
Size 45KB
SHA256 661a304e57a997ca1930f95491982605367f996223deef5542b40a2919f5fd76
MD5 2281b848d2d98744e7a273a52116d9a3
SHA1 6da2511fc10f7baf3b718c6cb437587a94efff77
SHA512 99b9f1c10145b3e3dc41581b4f1b50e47e81a30ddd8db5003dfc05861443add71ee7335128845242d5bab98022b5bb1ff065815eb515036eb5d0d5d6e2bfc188
SSDEEP 768:cu7//5THrq+CWUoDuMmo2qFTls5ohEaMPIS3jbQgX3imzPs4JPw7LKkBDZUx:cu7n5TH2A2m44EaxSTbXXSmzk4J47LKd
TLSH
T1F9232B003BE9822BF2BE4F7899F261454A7AF2637603D54D1CC442DB5613FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4768-0-0x0000000000510000-0x0000000000522000-memory.dmp

Download

memory/4768-1-0x0000000004F70000-0x0000000004F80000-memory.dmp

Download

memory/4768-2-0x0000000005020000-0x00000000050BC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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